Metal-working tool.



v f No.727,629. v 1

' .HILL

META RKINGA TOOL. APP IIIIIIIIIIIIII AN. 99999 s.

"PATBNTBDMAY 12, `1903. 4

2 SHEBTSQBEEET z.

no nnnnn L.

summon 0- C .PATENT Patented 1Y`Ia5r12,1903. I

OFFICE. y

ALFRED B. HILL, OF IRONWOOD, MICHIGAN.

METAL-WORKING TOOL.

SPECIFICATION formngpart of Letters Patent No. 727,629, dated May 1.2, 1903. Application tiled January 9. 1903. Serial No. 138,345. (No model.)

To all whom t concern j Be it known that I, ALFRED B. HILL, acitizen of the United States of America, residing at Ironwood, county of Gogebicand State of Michigan, have invented certain newandusework and -for similar uses, andhas for its ob-l ject the construction of a simple and effective device for the purpose described.

rIo this end my invention consists in the novel construction, arrangement, and combination of parts herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like referencenumeralsindcate like orcorresponding parts, Figure l is a side elevation of my improved device with parts broken away'to show the construction. Fig. 2 is a transverse section in line 2 2 of Fig. 1. Fig. 3 is'a similar sect-ion in line 3 3 of Fig. 1. elevation of the movable carriage or tool.

Fig. 5 is a longitudinal vertical section of the',

same, and Fig. 6 is a detail view'of a slight modification.

In the drawings, 1 represents a mandrel of well-known construction, such as is in common use by tinsmiths and metal-workers generally. It is adapted to be secured'nea'r one end upon a bench in any preferred manner and to extend therefrom in the usual Way. 2 is an uprightV block integral therewith, adapted to be secured to the end of the mandrel in any preferred manner, so that the bar 3 carried thereby shall extend parallel to the mandrel 1 and spaced therefrom. As shown in the drawings, the block 2 is secured to the end of the mandrel by having its lower portion constructed to engage with the dovetailed'form' ofthe end ofthe mandrel, as shown in Fig. 3,-set-screws 4 4 serving to -lirmly secure the two together.V The free end of the bar 3 in the preferred form is provided .with a looking-bar 5, pivotally connected thereto and formed to engage with the mandrel l, as clearly shown in Fig. 1. It is obvious, however, that said locking-bar need not be permanently secured to either part or Fig. 4 is a side may be pivotally connected to either for convenience, as'preferred. A rotatable shaft 6 is provided withacrank 'Z and a sprocket-wheel 8. A second shaft 9 `isprovided with sprocket-wheels 10 and a similar sprocket-wheel 11 or its equivalent for the purpose designed. Near the end of the bar 31's a transverse shaft 12, provided witha similar sprocket-wheel or member 13, the two,wheels 11`and 13 being preferably centrally located between the depending sides r14 14 of the bar 3. (See Fig. 3.) A sprocket chain 15 connects the sprocketwheels S and 10, while a similar sprocketchain, belt, or its equivalent 16 connects the wheels 10 and 13. It will thus be obvious that upon operating the crank 7 power will be transmitted to the various sprocketwheels, and the chain 16 will be driven in one direction or the other, preferably in the direction indicated bythe arrow, Fig. 1.

A seamiug or other suitable tool 17, guided and 'retained in position by the bar 3, is positioned between said bar and the mandrel 1, *so that the rollers 18 19 coperate with said mandrely in working said material, as clearly 4shown in Figs. 1 and 2. Any preferred means may be employed to engage the tool 17 with` the chain 16, so that said tool will be operfated bythe movement'of the chain. In the preferred construction a clutch mechanism iis provided for this purpose, so that the tool may be carried in one direction bythe action of the chain and then released therefrom and moved in the opposite direction by hand, thus obviating the necessity of reversing the operation of the crank and various parts of the mechanism. As shown in the drawings, the tool is carried by the bar 3, the tool-frame embracing said bar, and in the preferred form the' frame is provided withantifriction devices, which will be later described. A transverse bar 20, carried by the tool, (see Fig, 5,) cooperates with a movable bar 21,"whiclhi is provided with a springl22or its equivalent,

tending to resiliently hold said bar at its-limit of movement toward the bar 20,1,whereby.the two are adapted to engage' the chain 16 between them, as clearly shown in Fig. 5. Lateral extensions 23 23 are projected beyond the side of the tool and positioned in vertical slots 24, permitting a limited vertical -movement IOO of said bar 2l to disengage the chain. A transverse shaft 25 carries a wing 26 on either side of the casing of the ltool, adapted to contact with the extensions 23 to depress the bar 2l against the action of the spring 22, thereby releasing the tool from the chain 16. A crankarm 27 or equivalent means is secured to the shaft 25 and serves to rotate the same` and thus operate the wings 26, as described. Upon releasing the extensions 23 from the action of the wings 26 the spring 22 lifts the bar 21 again into operative position, and the tool is again engaged with the chain. If preferred, the engaging portion 2l may be carried by the extension-bar 23, and the resilient means may be situated at either end thereof Without the casing, as clearly shown in Fig. 6. The operation, however, is substantially the same. It is obvious that when the tool is in operation the bar 3 exerts a downward pressure thereon. In order to reduce friction, the friction-rollers 28 2S are provided to contact with the lower side of the bar 3 and maintain the tool in proper working position. If desired, any side friction may be substantially obviated by ball-bearings 29 29, Figs. 1, 2, and 5, positioned in the frame of the tool and maintained in position by suitable retaining covers or plates 30 30. The locking-bar 5 is preferably hinged to the bar 3, as at 3l, and is provided with a hook 32, formed to engage with the mandrel 1, as clearly shown in Fig. 1. An inwardly-extending bow or bend 33 may be provided, so that the tool in its forward movement will strike said bow or bend and disengage the bar from the mandrel. In the prefer-red construction shown in the drawings the casting2 is rigidly secured to the mandrel, as shown, while the bar 3 is pivotally connected thereto at a point, as at 34. A suitable spring 35 is positioned between the casting 2, and an extension 36 to the bar 3 tends to normally throw the free end of the bar 3 upward, so as to release the work positioned between the tool and the mandrel.

The general mode of operation is obvious and does not require a description. Of the form shown in Fig. 1, however, a brief mention maybe made. Upon operating the crank 7 the chain 16 will be driven in the direction indicated by the arrow, the clutch mechanism on the tool 17 carrying the tool therewith. Vhen the tool is moved forward to nearly the limit of its movement, it strikes the lockingbar 5 and releases the bar 3 from engagement with the mandrel. This permits the outer end of the bar 3 to move upward to its normal position and permits the work to be readily removed. At the same time the lever or crank 27 is operated, releasing the tool from the chain, and the tool may now be returned to its initial position ready for the next operation. Upon releasing the crank 27 the tool is again automatically engaged with the chain and ready for the next operation. Placing the metal to be operated upon upon the mandrel in its proper position, the bar 5 is again engaged with the mandrel 1, and the operation may be repeated.

It is obvious that, if desired, the bar 3 and mandrel l may be permanently connected, forming a complete machine, so that, properly speaking, my improvement will not be an attachment to a mandrel, but the two will constitute a complete working device. It is also obvious that upon reversing the operation of the crank 7 the tool may be made to work in either direction, as preferred. These, as well as other immaterial modifications, may be made without departing from the spirit of my invention. Hence I do not wish to be understood as limiting myself to the exact form and construction shown in the drawings.

Vhere in the claims I refer to an endless chain, I wish to be understood as including also a belt or other equivalent means for the same purpose.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a device of the kind described, a mandrel, in combination with a guiding and retaining bar arranged parallel to and spaced from the mandrel, an endless chain extending lengthwise the bar,means for driving said chain, and a movable tool attached to said chain and maintained in position between the mandrel and bar.

2. In a device of the kind described, amandrel, in combination with a guiding and retaining bar, arranged parallel to and spaced from the mandrel, an endless chain extending lengthwise the bar, means for driving said chain, a movable tool maintained in position between the mandrel and the bar, and means for engaging and disengaging said tool with the chain.

3. In a device of the kind described, a mandrel, in combination with a guiding and retaining bar arranged parallel to and spaced from the mandrel,means for temporarily locking the free ends of the mandrel and bar together,an endless chain extending lengthwise the bar, means fordriving said chain, and a movable tool attached to said chain and maintained in position between the mandrel and bar.

4. In a device of the kind described, amandrel, in combination with a guiding and retaining bar arranged parallel to and spaced from the mandrel, means for temporarily locking the free ends of the mandrel and bar together, an endless chain carried by and extending lengthwise the bar, means for driving said chain, a movable tool maintained in position between the mandrel and the bar, and means for engaging and disengaging said tool with the chain.

IOO

IIO

5. In a device of the kind described, a manl drel, in combination with a guiding and a retaining bar arranged parallel to and spaced from the mandrel, an endless chain extending lengthwise the bar, means for driving said chain, a movable tool attached to said chain tool, whereby the forward movement 'of the tool will. disengage the lock, substantiallyas Y set forth.

6. In a device of the kind described, a mandrel, in combination with a pivotally-supported guiding and retaining bar spaced therefrom, and adapted to be maintained parallel therewith, means for normally lifting the free end of the bar out of a plane parallel with the mandrel, an endless chain extending lengthwise the bar, means for driving said chain', a movable tool attached to said chain and maintained in position between the mandrel and the bar, and means for temporarily locking the free ends of the mandrel and bar together in operative parallel position.

7. In a device ofthe kind described, a mandrel, in combination with a pivotally-supported guiding and retaining bar, spaced therefrom and adapted to be maintained parallel therewith, means for normally lifting the free end of the bar out of its plane parallel with the mandrel, an endless chain extending lengthwise the bar, means for driving said chain, a movable tool maintained in position between the mandrel and the bar, means for engaging and disengaging the tool with the chain, and means for temporarily locking the free end of the mandrel and the bar together in operative position.

8. In a device of the kind described, a mandrel, in combination with a pivotally-supported guiding and retaining bar spaced therefrom and adapted to be maintained parallel therewith, resilient means for normally lifting the free end of the bar out of the plane parallel with the mandrel, an endless chain extending lengthwise the bar, means for driving said chain, a movable tool attached to said chain and maintained imposition between the mandrel and `the bar, means for temporarily locking the free end of the mandrel and the bar together in operative parallel position, and disengaging means positioned in the path of the tool, whereby the forward movement of the tool will disengage the lock, permitting the bar to return to its normal position. y

9. An attachment `for mandrels,comprising a block adapted to be rigidly connected to the mandrel, and provided with a guiding and retaining bar adapted to be extended in a direction parallel to and spaced from the mandrel, in combination with an endless chain extending lengthwise the bar, means for driving said chain, and a movable tool attached to said chain and maintained in position between the mandrel and the bar.

10. An attachment for mandrels, comprising a block means for rigidly attaching said block to the mandrel, a bar carried by said block and adapted to be extended in adirecv tion parallel to and spaced from the mandrel,

an endless chain extending lengthwiseA the bar, means for ydriving said chain, a movable tool carried bysaid bar and adapted to "be maintained in positionbetween the barand the mandrel, and means forv engaging and disengaging said tool with the chain;

11. In adevice ofthe kind described,a manextend parallel to and spaced from the mandrel, transverse shafts 9, and 10, arranged at the ends of the bar, and carrying sprocketwheels 11, 13, respectively, a second sprocket- Wheel 10, arranged on shaft 9, a drivingwheel 8, provided with a crank 7, and av sprocket-chain connecting the wheels 8, and 10, and a second chain 16, connecting the sprocket-wheels 11, 13, a movable tool 17, carried by the bar 3, and means for engaging and disengaging the tool 17 with the chain 16, substantially as described.

13. An attachment for mandrels, comprising a vblock adapted to be rigidly connected to the mandrel, a guiding and retaining bar pivotally connected to the block permittingv a vertical movement of the free end of the bar, means for locking the bar in a position parallel to the mandrel, an endless chain extending lengthwise the bar, and mea'ns for driving the chain, in combination with a movhar 15. In a device of the kind described,aguid-.

ing and retaining bar, a movable tool 17, adapted to embrace said bar, a driving-chain carried by the bar and a locking-bar 25, in

IIO

IIS

IZO

combination with a coacting-bar 21, resilient Y means for retaining said coacting bar in its operative position, and means for depressing the coacting bar to temporarily disengagethe chain embracedbetween the bars 21 and 25, substantially as described.,

ALFRED s. HILL.

Witnesses:

G. M. CORNELL, J. D. McDoUGAL. 

